Censorship-resistance pertains to a specific property of a cryptocurrency network that functions as a check on transactions as it prevents outside entities from making changes to the transactions. Once a transaction is added to the blockchain, it is distributed through thousands of nodes. It is then added to the distributed ledger. The added transaction is immutable as it is impossible to remove or change.
One of the main value propositions of Bitcoin, the idea behind censorship-resistance is that no nation-state, corporation, or third party has the capability of controlling who can transact or store wealth on the network. What this ensures is that the laws that govern the network are set prior and are not given the permission to be changed retroactively to fit a specific intention. What needs to be noted here is that censoring transactions on the Bitcoin network is not necessarily impossible, but are extremely resource-intensive.